<?php

namespace app\admin\controller\user;

use app\common\controller\Backend;
use think\Cache;
/**
 * 管理员日志管理
 *
 * @icon fa fa-circle-o
 */
class Tree extends Backend
{

    /**
     * Tree模型对象
     * @var \app\admin\model\Tree
     */
    protected $model = null;

    public function _initialize()
    {
        parent::_initialize();
        // $this->model = new \app\admin\model\Tree;

    }

    /**
     * 默认生成的控制器所继承的父类中有index/add/edit/del/multi五个基础方法、destroy/restore/recyclebin三个回收站方法
     * 因此在当前控制器中可不用编写增删改查的代码,除非需要自己控制这部分逻辑
     * 需要将application/admin/library/traits/Backend.php中对应的方法复制到当前控制器,然后进行修改
     */

    public function index()
    {
        // if (Cache::get('tree')) {
        //     $tree = Cache::get('tree');
        // } else {
            $member = model('user')->field(['id', 'pid', 'prevtime', 'nickname', 'logintime', 'jointime'])->select();
            $tree = $this->arr2tree($member);
            $tree = substr(json_encode($tree), 1, strlen(json_encode($tree)) - 2);
            Cache::store('file')->set('tree', $tree, 3600);
        // }
        $this->view->assign('tree', $tree);
        return $this->view->fetch();
    }

    public function arr2tree($tree, $rootId = 0)
    {
        $return = array();
        foreach ($tree as $leaf) {
            $leaf['name'] = $leaf['nickname'];
            if ($leaf['pid'] == $rootId) {
                foreach ($tree as $subleaf) {
                    if ($subleaf['pid'] == $leaf['id']) {
                        $leaf['children'] = $this->arr2tree($tree, $leaf['id']);
                        break;
                    }
                }
                $return[] = $leaf;
            }
        }
        return $return;
    }
}
